Treatment of cellulose derivatives



Patented Sept. 13, 1927.

UNITEDST-AT'ES PATENT ornoa.

GEORGETIOLLAND ELLIS, OF SPONDON, NEAR DERBY, ENGLAND, ASSIGNOB TOGEL-A- NESE CORPORATION OF AMERICA, A CORPORATION OF DELAWARE.

TREATMENT OF CELLULOSE DERIVATIVES.

No Drawing. Application filed September 27,1924, Serial No. 740,413, andin Great Britain October 8;

This invention relates to thedyeing, printing or stenoilling ofartificial threads, yarns,

fabrics, films or other products consisting of or containing celluloseacetate. I 5 According to the present invention apply for the dyeing,printing or stencilhng (hereinafter all included in the term dyeing) ofartificial threads, yarns, fabrics, films or other products consistingof or containing cellulosee acetate (all hereinafter 1ncluded in theexpression materials comprising cellulose acetate), vat dyestuffs of theanthraquinone series in the unreduced state in the form of their solubleor more soluble modifications prepared by pretreatment with any suitablesolubilizing agents. As splubilizing agents there may especially beemployed sulphoricinoleic acid or other sulpho fatty acids, or alkali,ammonium or other salts thereof, or other bodies. of oily or fattycharacteristics having salt-forming groups 7 or their alkali, ammoniumorpther salts all of which bodies, including the salts, are

hereinafter included in the term body of oily or? fatty characteristics,or any other suitable solubilizing agents may be employed.

The vat dyes of the anthraquinone series which may be applied-accordingto the presso cut invention include the various indanthrenes, cibanones,algols, helindone dyes,.

and other dyestuffs being vat dyes of the anthraquinone series.

The dyestuffs emplofyed should not contain strongly acid orsaltorminggroups (hereinafter referred to as strongly acidic groups) such assulpho groups, as it is found that this reduces the aflinity of thecellulose acetate. for compounds containing them.

The said vat d estufl's of the anthraquinone series may be employed"alone or together with other dyestuffs or coloring matters.

They ma likewise be employed for dyeing mixed threads, yarns orfabrics,n contaming or comprising cellulose acetate associated withcotton, silk, wool, artificial fibres .of the cellulose type, or othertextile materials, either in similar or different shades.

The following is an example of the manner in which the invention may berformed, it being understood that this is given only by way ofillustration and in no way as limitative.

' Ewmple.

Dyeing of 1% shade with algol pink R on 100 lb. of cellulose acetateyarn. 9 to 10 lb. of 50% aqueous sodium sulpho ricinoleate are heated toaboutt90 C. 1 lb. of algol pink R is then added, well pasted up, and theheating continued until the requisite degree of solubilization isattained. The resultant mass is then diluted with boiling aqueous soapsolution made from 3 lb. of good neutral soap and 8-10 gallons of water.This liquor is well stirred and added to the dyebath containing 300-500gallons of soft water. Dyeing is then carried on in the customary manneruntil the desired shade is reached, when the usual rinsing, finishingand drying etc. may follow'as desired.

What I claim and desire to secure by Letters Patent is 1. Process fordyeing materials comprising cellulose acetate, said process comprisingapplying to the material a vat dyestulf of the anthraquinone series inthe unreduced state, solubilized by pretreatment with a solubilizingagent.

2. Process for dyeing materials comprising cellulose acetate, saidprocess comprising applying to the material an unreduced vat dyestuff ofthe anthraq uinone series not containing strongly acidic groups, saiddyestuff being solubilized by pretreatment with a solubilizing agent. 3.Process for dyeing materials comprising cellulose acetate, said processcomprising applying to the material a vat dyestuff of the anthraquinoneseries in the unreduced state, solubilized bypretreatment with asolubilizing agent comprising a body of oily or fatty characteristlcs.

4:. Process for dyeing materials comprising cellulose acetate, saidprocess comprising applying to the material anunreduced vat dyestulf ofthe anthraquinone series not containing strongly acidic groups, saiddyestuffs being solubilized by pretreatment with a solubilizing agentcomprising a body of oily or fatty characteristics.

5. Process for dyeing materials comprising cellulose acetate, saidprocess comprising applying te the metet'iel it Vet dyeetufl? e1 thestuff at the elethmquitlene series net cenentht'equmene eetles 111 theum'edlueed etete tmnmg strongly eelche groups, szut't dyeetufl'selublhzed by pretreatment wlth eedmm bemg' solubihzedt by pretreatmentwlth m sulphet'ieineleete. sodium eulpl'iericinoleate.

(3. Process for dyeing materials comprising In testimony whereof I havehereunto cellulose acetate, emd precese cempmemg epeutscmbed my lmme.plymg to the matemet en untedueed vet dye- GFEURGE HULLAND BELLE.

